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CHAPTER 5
THE PHILOSOPHER-KING: PLATO
Chapter 5 Key Concepts
Socrates trial and death convinced Plato that Athenian
democracy was irrational mob rule. His experiences with the
Thirty convinced him that rule by a greedy, cruel social elite
was no better than mob rule.
In Plato s metaphysics, the highest level of reality consists
of timeless essences, or entities called ideas, or forms. Such
In Plato s epistemology, knowledge is always of things in
their unchanging, eternal form, of their essence. Opinion, by
Plato used the concept of the Divided Line to illustrate
the relationship of the worlds of being and becoming. The
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In the Allegory of the Cave, Plato illustrates the soul s
progression from the lowest to the highest levels of
The Republic contrasts two views of morality. The
instrumental theory of morality asserts that right and wrong
must be determined by the consequences our acts produce,
The just state functions fully. An unjust state is
dysfunctional, with some essential need not being met. Only
The just state meets three basic categories of needs:
SOCCIO ARCHETYPES OF WISDOM
Plato identifies four cardinal virtues necessary for a good
society and for happy individuals. He defined virtue as
excellence of function. Wisdom is the virtue associated with
The human soul resembles the state in that it, too, is
divided into three parts: reason, spirit, and appetite. The just
Plato rejected democracy as unjust because rule by the
majority usurps the rightful role of the guardian class. The
Unable to distinguish necessary desires from unnecessary
ones, democratic souls are at the mercy of their strongest
Plato thought that the excessive liberty found in
democracies contains the seeds of an opposite impulse known
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Chapter 5 Teaching Tips
1. Point out that the Greek root of our word idiot originally
referred to the idiotes, a completely private, nonpolitical
2. Discuss the Philosophical Query on page 154. How can we
best balance individual liberty with the need for functional
institutions and organizations? Must we choose between
excesses of liberty or excesses of tyranny?
3. Most students find Plato s theory of the origin, nature,
and decline of democracy fascinating. Take advantage of this
4. Discuss the concept of shamelessness in regard to setting
5. During the 2008 presidential campaign, Barack Obama
declared, We are the ones we have been waiting for. Both
he and his opponent John McCain routinely referred to the
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6. Weigh the pros and cons of a more rigid (safe from
terrorists?) Platonic social order and a completely free
(individualistic?) democracy. How free are people born into
culturally and economically deprived families? Might there be
a benefit in somehow restricting people s educational and
career choices to areas fitted for their abilities and
personalities instead of letting us all fight it out
competitively? Who decides who is fit for what? How?
7. H. L. Mencken s vitriolic critique of democracy, for all its
excesses, contains some compelling elitist criticisms. The best
8. Use geometry for a somewhat sophisticated example of
how Plato s theory of forms was meant to answer the
Sophists attacks on the possibility of absolute truth. Recall
that the Sophists claimed that each individual is the
measure of things and that appearance equals reality. That is,
everything is somehow a matter of convention, agreement,
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This formal quality belongs to the triangle, not the
geometer. The geometer is describing a public (objective)
The form Euclidean triangle is not lines on paper or a
blackboard, it is not a visual image in a person s mind
though it is grasped or seen with the mind. All
representations (sometimes called instances ) of the form
Euclidean triangle participate in this form. They are
representations or copies; they are enough like the form itself
that they remind us of the real thing. But sooner or later,
these copies change: They decay or fade.
Yet every physical manifestation of the form Euclidean
triangle varies from this: Lines produced by the highest-
quality laser printer are, in fact, bits or points of matter (ink);
the smoothest paper, under microscopic scrutiny, contains
pits and ridges and fibers; and so on. Although we may not be
able to perceive the differences and imperfections among
9. Today s divisive political camps invite comparison to
Plato s argument that the excesses of liberty provoke calls for
10. In line with tip 9, use the For Deeper Consideration on
11. For a fun exercise, have the class discuss Plato s
assertion that in democracy gone wild, it s love me, love my
dog. Where is the line between sane, humane treatment of
nonhuman animals and unbalanced egalitarianism ? See the
12. For a more serious discussion of Plato s fear that
13. Use the photo on page 132 of the grieving child as a hook
to have students ask themselves what the thing is that they